1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff0c43410e165c8da06bfe8d74e7617ad26ecb6701af53611de1c3a5dce147. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03fc2920-7e2c-43ef-bf4f-c61d95aff96c.json and https://artists.proofprofile.net/proofs/artist/03fc2920-7e2c-43ef-bf4f-c61d95aff96c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad74b30b442f08f201626b259956da1e6718d4d52386f27531be33eae2e7d469. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8aad3ece0f09d85f113c6c176df12051268446497d658165f6ad33f0199a9a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7cdf7ec8cb8b5110324c56174a11c023f080252576e6d898352e5cd65137d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264ce69b92b87a86b9a4d5695d894209a98501a39b410f434706a6a4d205eecf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2a5445d60e78fba73d8950d2598df1ecf1c5644d77d58d2517255babcca4f9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07bc6a20943861232e6f2bc0ba24d0473703cc260a1f47df087a2d4e9aeb247. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedaa276e6a698bbd696a1591d02e1435ae52a78b1200a9f36d393da05fa3f6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5e3c486db93e15cf6438d7129214526b1e63e55c991fbaea2f99dfe95f8439. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4adcda408e138e03de596aef093e544c7114fd5d4bd969e9f1763807150d7f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5022100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bd2214e9f0b27d01d7fe1645178d69920f37a636c501e582b9028cb6954ad9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5022100584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0568dabb9731fb502e2cce0bda457423aca31de35f0b5a3d8fa5f531694256b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5022100585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8efa5fe88eed8b1a7106aefbd7ade7c2003848bafaa280c2a34a5acccd9a900. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5022200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6149bcb82a9765c3f871c493a9a91ee046bd3a77ad6efb0c3f24fac4f0495. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5022202197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8b092f50a5ceb291238fad34a1309f92954d1bb31fe7a228f885f12109fa0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2239444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62f6c4f035bc40a7775b6f174c462d12d95abaa8fce54b2643532d398f477e8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2311925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15503087f20e009327f0352461dbf9fa5b9f6c6b9815941e6e7eb7305ba66bd1. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2324187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ceabc00527854262139e1ab85e7757128989c7f57db9fc0cf8ec504c42b1e9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2325886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60fa18f74f3c59d6b14ae80acea709d87bac3db29edadbe793b90a170dc16d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2325761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15503087f20e009327f0352461dbf9fa5b9f6c6b9815941e6e7eb7305ba66bd1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2324187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6ff4ac580260447037263ea30cc8e848ea64b099c7419e384249a5e5f80e01. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2327944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8b092f50a5ceb291238fad34a1309f92954d1bb31fe7a228f885f12109fa0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2239444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c0756242671b4cacacfb113b6d117bb9981dc2d12a451754392c04b9322e4c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2327947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5452c48f3b843c78ba368fa825942e605ecfc501d4e48371bf671b72eefcc432. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2409534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51cbb36c93f95a02ae7155308fd535eec2a74d9e82d50d5cfd5b84020765e8b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2246581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60fa18f74f3c59d6b14ae80acea709d87bac3db29edadbe793b90a170dc16d7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2325761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338fa8e4603f58721d0495914d59d569f5243be9a33c0ceaccf6fd05d6545113. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2410944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d512463d3b4fb398be6ddeb4f135930f6eaf0d18cee0140ec92ad0de690197d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2410943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef448b04df1e5c90eadb860efb8c8b896cc030ef3607a23f0dccca2fccbd97ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2426210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd387c549c718995ba902601edf0b98617be92c76fb854f1fae8961fc5ef2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2221663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd387c549c718995ba902601edf0b98617be92c76fb854f1fae8961fc5ef2b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2221663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3b9c128c3815038fc80301c7009ba5567f74a0c0a4fc9131c9ee76cfad1a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESUM72300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0934c230650dcae05649190df2e9db58713005ecae2e658b6ae5646d71e4e59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2020738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad74b30b442f08f201626b259956da1e6718d4d52386f27531be33eae2e7d469. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b64212d01fd75ade590061ce93ecc0eca58e20435debbb77349c68674a927e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf5c0fbef65d25e7609b60e9f4f947028ca62d72e34115695cd884efc44aa58. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8aad3ece0f09d85f113c6c176df12051268446497d658165f6ad33f0199a9a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedaa276e6a698bbd696a1591d02e1435ae52a78b1200a9f36d393da05fa3f6e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07bc6a20943861232e6f2bc0ba24d0473703cc260a1f47df087a2d4e9aeb247. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7cdf7ec8cb8b5110324c56174a11c023f080252576e6d898352e5cd65137d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682000097.